Add 35/21 and 18/84
1st number: 1 14/21, 2nd number: 18/84
35/21 + 18/84 is 79/42.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
35/21 = 35 × 4/21 × 4 = 140/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
18/84 = 18 × 1/84 × 1 = 18/84 - Add the two like fractions:
140/84 + 18/84 = 140 + 18/84 = 158/84 - 158/84 simplified gives 79/42
- So, 35/21 + 18/84 = 79/42
In mixed form: 137/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/21+18/84 35/21+36/84 35/42+18/84 35/21+54/84 35/63+18/84 35/21+90/84